But... in at the least two circumstances this option is helpful: backfilling additional bars soon after settings change (after you enlarge 'amount of bars to load' in File->Database Options dialog you have to drive backfill for symbols that were backfilled previously with scaled-down variety of bars) The set up wizard https://sergiouvtsp.bloginwi.com/68823224/the-basic-principles-of-amibroker-data-feed